Firearm



:p patenied Sept. 15,1925 l "Y Y UNITED fYsTATYEs@ PATENT OFFICE y Q'T'TQ WALKERF ZURICH; SWITzEaLANi). Y 1

y Y YFIREARivrQYV n Y Y Arpliation Vfiled May 271,` 1924. serial No. 714,894. f' ,V ATo all wtomjff/nwy concern, p e tdthe brfelfat its. hind gend. The S19/vga Y y Y f Be it known that I, Ofr'roWALiinn, mer-' is'dividedin chambers 5 by rings et '7 and 8 gchant, a citizen of the Swiss Confederation, arranged between gtwo' consecutive rows I of l Y Y Y residing at Zurich,k Bleicherweg 28, Canton slots2. VThe bore 6 of the barrel comnfiunifv 35' y45 Zurich, Switzerland, have invented new and Cates by said slots 2 with the chambers 151v useful Improvements in Firearms, of which The sleeve 3V, isfastened with one endvonly y the following is a specification. to the barrel l preferably the hind endthe Y v The present invention relates to improvefore end 7 is slidable on the `barrel to VallowA Y. ments'in fire arnis,especiallyl inrliiles, mathe expansion and contraction oi the VY40 f10 chinevguns and so on. Y Y Y f y-sleeve 3 Y Y fr f lThe'oloject of .the inventionis to reduce' On firing a shot the gases passffrom/the fix thev noise, the recoil and the muzzle fire-toa j barrel 1 into the chambers 5 whereby the v'minimum without impairing the good qualinoise vis minimized as well as thel flare Y, v ties of the 'fire arm. I attain these objects the muzzle. The initial speed of the bullet 45 f'; ,1: 5 `by providing slots in? thebarrel which "slots is notdecreasedin any perceptible manner.:l v i communicate,"'witlrVV 'chambersy p arranged What I .wishto secure 'by U.Y`S. Letters f around the barrel. The chambers may be Patent iszf Y. I i l vformedloy a sleeve surrounding the .barrel vA fire arms barrelhaving radial slotsar-j and being screwed on to the barrel.. ranged in spaced relation longitudinally of 50' f 20 In' the accompanying drawing one mode thel barrel, a mantle. of greater diameter V'of construction is shown by way of an eX- than, secured on and. surroundingsaid "slot,-A ample. ted portion of the barreland partition rings Fig. l shows part of a barrelo a rifle Ain in-Vsaid mantle and through which thebarrel Y Y section. f v extends, said partition Vrings being arranged 55 y f 75 Fig. 2 isa cross-section-on line A-B of (between slots of the* barrel and'. formingl g Fig. 1. Y spaced chambers in said mantleeach of y l In the drawing v l denote-s the barrel of a which chambers is in communication with Y riflev which is provided with radial Vslots 2. one of said slots. Y Y Y The slots 2 arearranged in rows at different In witness whereof I aiX Vmy signatureif Y i.; n 301 distances apart. Y The barrellissurrounded f Y l Y 1i 1 'by'a sleeve or mantle 3 vwhich isl screwedfon Y QTTO 

